Hi there,
open header.php and paste this
<?php
$args = array(
'post_type' => 'post',
'p' => 233,
'posts_per_page' => 1
);
// The Query
$the_query = new WP_Query( $args );
// The Loop
while ( $the_query->have_posts() ) : $the_query->the_post();
?>
<div class="row top-article">
<?php if ( has_post_thumbnail() && ! $hide_featured_image ) : ?>
<div class="entry-featured">
<a href="<?php the_permalink(); ?>">
<?php the_post_thumbnail( $masonry ? 'ci_masonry' : 'post-thumbnail' ); ?>
</a>
</div>
<?php endif; ?>
<h2 class="entry-title">
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
</h2>
<?php endwhile; ?>
</div>
<?php
// Reset Post Data
wp_reset_postdata();
?>
after
<div id="site-content">
Replace in
'p' => 233,
the 233 to you post ID.
Finally use this inside your custom css box
.top-article{
border:2px solid red;
}
inside your custom css box to highlight it
This will appear everywhere though.